RVOS/plic.h at master · GartonChan/RVOS · GitHub

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#ifndef __PLIC_H__
#define __PLIC_H__

#include "platform.h"

/*
 * This machine puts platform-level interrupt controller (PLIC) here.
 * Here only list PLIC registers in Machine mode.
 * see https://github.com/qemu/qemu/blob/master/include/hw/riscv/virt.h
 * #define VIRT_PLIC_HART_CONFIG "MS"
 * #define VIRT_PLIC_NUM_SOURCES 127
 * #define VIRT_PLIC_NUM_PRIORITIES 7
 * #define VIRT_PLIC_PRIORITY_BASE 0x04
 * #define VIRT_PLIC_PENDING_BASE 0x1000
 * #define VIRT_PLIC_ENABLE_BASE 0x2000
 * #define VIRT_PLIC_ENABLE_STRIDE 0x80
 * #define VIRT_PLIC_CONTEXT_BASE 0x200000
 * #define VIRT_PLIC_CONTEXT_STRIDE 0x1000
 * #define VIRT_PLIC_SIZE(__num_context) \
 *     (VIRT_PLIC_CONTEXT_BASE + (__num_context) * VIRT_PLIC_CONTEXT_STRIDE)
 */
#define PLIC_PRIORITY(id) (PLIC_BASE + (id) * 4)
#define PLIC_PENDING(id) (PLIC_BASE + 0x1000 + ((id) / 32) * 4)
#define PLIC_MENABLE(hart) (PLIC_BASE + 0x2000 + (hart) * 0x80)
#define PLIC_MTHRESHOLD(hart) (PLIC_BASE + 0x200000 + (hart) * 0x1000)
#define PLIC_MCLAIM(hart) (PLIC_BASE + 0x200004 + (hart) * 0x1000)
#define PLIC_MCOMPLETE(hart) (PLIC_BASE + 0x200004 + (hart) * 0x1000)

void plic_init(void);
int plic_claim(void);
void plic_complete(int irq);

#endif /* __PLIC_H__ */